Well it’s a bit of a cheat as ‘technically’ on the 29th I’ll be blogging all of the RCAHMS contributions for Day of Archaeology, so I’ve made my own contribution early!

I’ve been at RCAHMS for 5 months working with the Data and Recording section. I’m lucky enough to be here on a funded IfA/HLF bursary which allows me to get involved in a number of different projects to provide training and workplace learning. However at the moment I’ve been working on the Defining Scotland’s Places project (when I’m not blogging for Day of Archaeology that is!) which aims to create site area polygons for existing records. These polygons will effectively create an intelligent map containing attributes and information about the site itself. To create the extent polygons, a number of sources are consulted such as aerial photography, Ordnance Survey mapping both current and historic, RCAHMS 1:10,000 record sheets as well as information created from field surveys. All of these sources are taken into account to determine the most accurate site extent.

I’ve been working on polygonising the Western Isles and I’m currently focussing on Harris. The map shows the areas which have been polygonised already as part of the project (seen in pink).

Both RCAHMS and Western Isles local authority records are available so the project provides an opportunity for concordance between the two sets of records as well.

In essence the project creates a new intelligent map which has been digitised from a combination of other sources including the record summaries which give details of the site.

Polygons are a closed shape which define an area. They provide far more information about the site than a simple dot on a map. The polygons are also flexible enough to be created for any type of site. Even at a glance polygons allow for a much more understandable map of the sites already recorded in Scotland and can be further interrogated for more detail and information.

This new data provides a much more visual understanding of the sites and their surrounding landscape. I’ve been learning a lot about the landscape of the Western Isles during this project which will no doubt come in handy when I visit the area in a few weeks to give a download of the data created so far to the Western Isles archaeologist.

For more information on the specific details of this project see the RCAHMS website.